0.0005 meters. In the conversion of mathematical weight units, nanometer is a unit of length, which is one of the units of length in the international system of units, and is expressed as "nm", 1 nanometer = 0.000000001meter, so 500 nanometer = 500 ÷ 0.00000001= 0.00000. Mathematics is a subject that studies concepts such as quantity, structure, change, space and information.